Yarn carrier stop device for straight knitting machines



E. RICHTER Oct. 27, 1936.

YARN CARRIER STOP DEVICE FOR STRAIGHT KNITTING MACHINES Filed March 6,1934 5 Sheets-Sheet 1 Emil gchw,

IN VEN TOR.

A TTORN Oct. 27, 1936. RICHTER 2,059,144

YARN CARRIER STOP DEVICE FOR STRAIGHT KNITTING MACHINES Filed March 6,1934 5 Sheets-She'et 2 :Fl E;- E. 1 11 B I .5.

2 rzzb INVENTOR- ivhfr,

Emil

I ATTO E. RICHTER Oct. 27,1936.

YARN CARRIER STOP DEVICE FOR STRAIGHT KNITTING MACHINES Filed March 6,1954 ,5 Sheets-Sheet 3 INVENTOR:

fmiljjic m, BY

ATTORNK Patented Oct. 27, 19 3 6 I PATENT OFFICE YARN CARRIER. STOPDEVICE FOR, STRAIGHT KNITTING MACHINES Emil Richter, Spring CrestCourts, Pal, assignor, by mesne assignments, to Textile Machine 1 Works,WyomissingJa a corporation of Pennsyl vania f Application March 6, 1934,Serial No. 714,235

1 Claim.

My invention relates' to straight knitting'machines, and particularly toyarn carrier stop means. for limiting or arresting the movement of thereciprocative carrier rods, or equivalent ,ele-

-ments, in.such machines. v

-'In the production of certain fabrics, especially full fashionedstockings, it has been found desirable or'necessary to modify or varythe throw of selected yarn carrier rods as ordinarily estab- 10 lishedby the usual yarn carrier stop mechanism of the knitting machine, i. e.,so. that the throw of one or more of the yarn carrier rods is greater orless than that ordinarily established by the usual carrier stopsemployed.

For example, and by way of illustration only,

is is customary to,protect the heeland toe portions of a stockingagainst the extra wear ordinarily'occurring at these places, by addingto these portions one or more reinforcing or plating yarns interknitwith the main body yarn, such result being obtained, after knitting theleg portion of the stocking blankto the place where the reinforcementbegins, by placing in operation additional yarn carrier rods for layingthe extra or reinforcing yarns. Heretofore, these rods have had thethrow thereof determined by the usual end and intermediate stops of themachine, and since the respective end stops of each group at the ends ofthe machine move only in unison, the an limit of travel of thereinforcing carrier rods at the selvedge edges of the blank hascoincided with that of the main body. yarn carrier, thus causing thereinforced areas to extend to and be included in, the selvedge edges.

35 When the opposite selvedge edges of the stocking blank are looped orstitched together, there I ordinarily results a seam of considerablebulk which is uncomfortable to the wearer and unsightly in appearance.These disadvantages may be obviated by the use of the present invention,

since when a reinforcing yarnor yarns have been laid by the platingcarriers to a point short, by a i certain distance, from each selvedgeedge of the blank, as by the width of two or three wales, the

45 plating carrier rods may be arrested at this point by the stopdevicesdisclosed herein, the movement of the through or main yarncarrier rod continuing to the selvedge edge; this operation resulting inthe production of a selvedge edge. or mar 5 gin of reduced thickness,relative to the reinforced areas of the fabric, from which a. seam ofthe desired characteristics may be formed; permitting the main yarncarrier only to continue-to the selvedge edges, thelatter will be freefrom as reinforcement; by causing one of the-plating carriers at eachside of theblank to also continue to the selvedg'e edges, the same maybe reinforced, but to a degree less than that of the adjoining areas inwhich additional reinforcing yarns are employed. 5

' and durable in construction, economical to manu- 15 facture andefiective in its operation;

Another object of the invention is to provide an auxiliary stop deviceadapted to installation. on machines of standard construction, and toexisting installations, with a minimum of labor, expense and structuralalteration. 20

Another object of the invention is to provide a. stop device formodifying the-action of the usual stop members, which device shall be inthe nature of a readily-available and operable auxiliary attachmentor-appertenance, for quick and convenient manipulation incident to theknitting operations; as distinguished from calibrating or set adjustmentdevices, such as screws and lock nuts, or the like.

Another object of the invention is to provide a device in'which certainparts may be readily interchanged and renewed, either to compensate forwear or to vary the throw of the carrier rods in accordance withdifferent requirements.

.Another object of the invention is to. provide a knitting machineattachment that shall be positive and accurate in operatiomand permitadjustments of fine degree. n

A further object is to provide in combination with the end stops of astraight knitting machine, an auxiliary stop device which can quicklyand easily be thrown into and out of operation, thereby to chage at willthe throw *of the yarn carrier rod controlled by the end stop.

With these and other objects in view, whichwill become apparent from thefollowing detailed. description of the illustrative embodiments of theinvention shown in the accompanying draw- .and having distance breaks,of the carrier rods,

- stops and associated parts of one section, of a device, as viewed atthe left-hand side of Fig. 1, with parts thereof omitted, and otherparts added,

full-fashioned knitting machine, to which one embodiment of my inventlonhas been applied;

Fig. 2 is a view, in front elevation and enlarged to substantiallyactual scale, of a portion of the which are: not shown in Fig. 1;

Fig. 3 is a view' taken substantially along the linel-lofFis. 2;-

Fig. 4 is a view, corresponding to 'a portion of Fig. 2, but on alarger'scale and having portions broken away and other parts in section,of a modined form of the invention; Fig. 5 is a view of thestructure ofFig. 4, taken" at right angles thereto;

'areas E of Fig. 8, and indicating the detail loop invention; and:

Fig. 6 is a view, similar to Figs. 2 and 5,-of

a further modified form of the invention; v

Fig. 7 is a view of a portion of the structure of Fig. 6,.takensubstantially'along the line 'I--'I thereof;

. Fig. 8 is a plan view. of the toe section of a stocking, fabricated'by -a machine embodying the Fig. 9 is a view representingamagnification of structure thereof. I

- In the drawing, only those parts of a full! fashioned knitting machinenecessary 'to a ,com- .plete' understanding of the invention are.therein shown, the various other parts, and the operation thereof beingwell known in the art, and shown and described indetail in theReadingFull Fashioned Knitting Machine Catalogue, copyright .1929,published by the Textile Machine Works.

. Reading, Pennsylvania.

The auxiliary stop devices of the invention may be employed either withthe carrier rod end stops or .the intermediate stops of a straight orfullfashioned knitting machine to vary, for any'purpose, at the selvedge edges, or intermediate the selvedg'e edges, of a fabric, the throw ofa selected yarn carrier or carriers as ordinarily establishedby the endand intermediate stops. The end stops, at eachend of the machine, aremoved in unison, no individual or relative adjustment being provided,except that of initial installation le'ctive' cooperation with the usualend steps or calibration, which may also require occasional change byreason of damage or wear. According to theillustrative embodiment of theinvention,

the auxiliary sto'p'elements are provided for sewhereby'to reduce thethrow of the associated carrier rods,'without afiecting the throwoi theother rods as determined-by the end-stops as sociated with such otherrods; these auxiliary elements bein'g'in the form of gauge plates orstrips for insertion between the rods and, the

ordinary stops, vor they may be in the formof eccentric cam for movingthe ordinary stops, .or of any equivalent form, either on the stationaryor movable parts, as will be more apparent from the followingdescription and the accompanying Referring to Figs. 1, 2, and 3, carrierrods ll eachjof which carries thread carriers l I for cooperation withthe usual needles 8 and sinkers and dividers! in the various knittingsections, one

of which sections is indicated at the lower portion of Fig. 2, arelongitudinally reciprocably mounted between sets or end' stops l2. Pivotpins ll, on

-' which the stops l2 are mounted, are secured,

as by brackets I 5, to nuts IS on a usual feed screw or carrierrodsplndle l I; A screw IS, in the lower.

; effected by manipulation -the nuts ll.

- As so far described, the structure 'of Figs. 1, 2, and 3 isusual, thestops l2 being individually The plate 2! is preferably secured portionof each stop I2, is locked in position by a nut is, and has a head 2|for arresting the movement of the cooperating carrier rod ll.Callbrating adjustments, to originally set the throw of the rods I] andto compensate forwear, are 5 of the. screws I8 and pivoted on the pin'sII for selectively throwing the 10 heads 2. about these pivots into, andout of, .the operative position shown, by manipulation 0.1 handles 22.The screw ll remains stationary excent-when the stocking blank is to benarrowed, at which time rotation of the screw moves the stops inwardlyin unison to a new-position to thus reduc'e'thethrow ofthe rods ll.

In accordance with a preferred form of the invention, as indicated inFigs. 1, 2, and 3, an auxiliary stop, for eachof any desired or required2 number or the main stops l2, may comprise a lever 23 having abifurcated end 230/ embracing the handle 22 and pivotally securedthereto, as

by a pin 24. A groove or channel 23b, in the face of the" lever 23 nextto the carrier rod Ill, 2

receives a gauge plate or strip 25, the thickness of which is determinedby the numberof wales by which it is desired'to reduce the ply of aselvedge edge of a stocking: as will further appear. *thelever 23, as bya screw and lock-washer de ce 2; all of the parts being accuratelymachined for precision iltj'and related to prevent subsequently workingloose, as in the featme whereby the strip 25 is disposed in the recessof thelever 22-and accu- .rately held at its edges, in additionto theholding eifect of the screw '2', and in the feature wherein the arms ofthe bifurcated end of the lever 22 operate in broad-area engagementwith, and over,

cooperating areas on the sides of the handle '22. v

As indicated on one of the handles 22,. at each end of the'rods II, andin full lines in Fig. 2, the lever 22 is in position to hold the strip25 between the carrier-rod II and the corresponding head a,thusreduc'lng the throw of the rod to less than the ordinary by adistance equal to the thickness of the gauge'strip 2|. 'Theithickness orthis strip may be such as'to provide a selvedge edge of reducedthickness of any. desired num- 'ber of wales vand be one of a set ofinterchangeable stripsfor changins this number; 'the strip of Figs.1,2,and 3 being of -a thickness toprovide .a selvedge edge of reducedthickness of two wales. in Fig. 8, the instep section of a stocking hasa singie-thread'web area A, a'rein- 5 forcediarea B of double-threadthickness, ,and a further reinforced area. 0 of triple-thread thickness,on the latter of which, as 'shown to magnifled scale in Fig. 9,Isprovideda relnforced'sel- In Fi s. 4 and 5, the screw llbhas aconstrict-' ed portion Ilsurrmmded by a ferrule 29 and holding a headedscrew 3|,between' which and the inner end of the-ferrule, a helicalspring v22 v surrounds constricted screw portion to 76 the ferruleinwardly along the screws, or to'the left as viewed in Fig. 4. ,A flange38 and a screwthreaded portion 33a outwardly thereof on the ferrule,provide seats for a wear or gauge head 34. A gauge plate or strip 251;,including a lower end portion 36 of inverted substantially U-sha'pe"having beveled lower edges, an upper end handle or grip 31, and avertical straight-sided central slot 39, is vertically slidably fittedagainst the stop l2b, as by a screw 4|l'on which is mounted a memberconstituting a rectangular guide for the strip ill-the slot as.

' nary stop function, and by which it. may be To operate this device, itis merely necessary to move the'strip 25b from its frictionally held, orotherwise secured, upper position to a lower position, during which thehead 34 is moved to the right, as viewed in Fig. 4, against the actionof the spring 32, and held by the spring against the strip.

In Figs. 6 and 7, the parts adjacent to the car} rier rod areconstructed as in an ordinary stop, and the adjustment of the inventionobtained by mounting the stop I20, as a unit, upon an eccentrio camportion 44 of the pivot pin or shaft l4c,.

about which the stop may be pivoted, in its ordimoved from left toright, asviewed in Fig. 6, by turning a knurled handle extension 45. Ara-.

dial pin 46 has snug frictional-sliding fit in a.-

radial aperture in the bracket I50 for similar fit in a radial hole orholes 41 in the shaft Me.

By radially moving the pin 46 clear of the pin He, the handle 45 may bemanipulated to turn the shaft to any desired position, and the pin 46returned to again lock the shaftythis operationadjusting the stop l2cand the head 20 to vary the throw of the carrier rod, as in the devicesabove set forth.

Of course, the improvements specifically shown and described, by which Iobtain the above results, can be changed and modified in various wayswithout departing from the scope of the invention herein disclosed and.hereinafter claimed. Further, it is to be understood that the meansspecified in the claim for stopping a selected carrier rod anincremental distance ahead of a cooperating carrier rod, includes anyelement or combination of elements which acting together or singly,causes a selected carrier rod to stop ahead of a cooperating carrier rodmoving in unison therewith, whereby the end of a selected carrier rod isspaced an incremental distance from the end of a cooperating rod whenboth rods have completed their effective strokes in one direction. Thatis to say, the above-mentioned means defines any means for stopping aselected carrier rod longitudinally ahead of a cooperating carrier rodby an increment of distance.

In a straight knitting machine having a plurality of yarn carrier rods,the combination of a movable head having a stop member thereon for eachof said rods, eachof said stop members to be thrown so said extensionplate will hang down in contact with the abutment surface of theabutment member of the stop member to which the lever isattached tovary.- the throw of the yarn carrier rod with which the stop membercoacts by a uniform amount irrespective of the position of the abutmentsurface of the abutment member relative to such stop member and saidlever and stop member arranged so that the lever may be thrown back andwill lie above the stop member to hold the lever in inoperative positionby gravity. EMIL RICHTER.

